Furnace



July 8, 1930.

iQ-J- July 8, 1930. w. G. cRoTHERs*v FURNAGE 2 Sheets-Sheet 2 Filed Nov. 29, L92'7 MMM I automaat Patented July 8, 1930 y UNITED STATES PATENT OFFICE WILLIAM G. CROTHERS, OF GARFIELD, NEW YORK FURNACE Application led November 29, 1927. Serial No. 236,560.

This invention relates to furnaces and more particularly to that type of furnace employing pulverized hydrocarbons as fuel.

An important object of the invention is to provide in a furnace of this character a novel and improved grate structure whereby all unburned particles of fuel are held in suspension in the furnace until .they may be burned and burned particles are sifted gradually into an ash pit fromwhich they may be removed from time to time.

A further object of the invention is to provide a grate construction, such thatv the furnace may be readily relieved of such particles as will not pass through the sifter grate.

These and other objects I attain by thel construction shown in the accompanying` drawings, wherein yfor the purpose of illustration is shown a preferred embodiment of my in-V vention and wherein y Figure 1 1s a vertical sectional view through the lower end of a furnace constructy ed in accordance with myl invention;

Figure 2 is a sectionalgview taken on .the horizontal planes indicated by the line 2 2 of Figure 1; 4 v Figure 3 is a sectional view taken on the vertical plane indicated on the line 3 3 of Figure l;

Figure 4 is an elevational view of a portion of one of the end twyers, the support therefor and the grate bars associated therewith;

Figure 5`is an elevational the manner in which the clinker door is supported against tilting movement in one direction; y

Figure 6 is a sectional view taken on the verticall plane indicated by line 6-6 of Figure 5;

i Figure 7 is a sectional View' taken on the l F igure-9 is a sectional view taken on ther horizontal; Figure l; y

Figure 10 is a top plan view of one of the fuel jets of the furnace; and

- 19. Any suitable means,

View illustrating of the lower wall of the lire box, which wall is f suitably supported, as indicated at 12, and the supports for the inner edge of the wall likewise provide supports for twyers 13 and 14. The twyers 13 and 14 each comprise a rectangular tube coextensive with the sides of the opening with which they are-associated. The twyers 13 and 14 are provided at their inner lower corners with openings 15. The passage of air through the openings 15 is in' each instance controlled by a gate 22 carried by a rockably mounted shaft 23 controllable to move the gate from open to closed position. The twyers 13 which are arranged along the ends of the opening are further provided at their inner upper corners with openings 20, these openings being controlled by a gate 18 carriedby a rockably mounted shaft not shown, may be provided for rocking the shafts 23 and 19 to effect the closing or opening of the gates 22 and 18. Any suitable means may be provided for supplying air under pressure to said twyers. In the present instance, the twyers are illustrated as interconnected and as having one thereof in communication with a pipe 24 leading from a blower (not herein shown). Y

rlhe numeral 25 generally designates tracks arranged beneath the ends of the opening defined by the wall 11 over which operate roller supported carriages 26 which,

through cross bars 27, support a sifting grate,

generally designated at 28. This gratehas its upper face slightly spaced from the lower faces of the twyers and each twyer 13 and 14 is provided with a plurality of depending ears 29'between whichV are extended the ends w of grate bars 30, which are held to the ears by pivots 31 extending through both thereof. The inner ends of these bars are threaded upon longitudinally extending rods 32, spacers or bosses 33 maintaining the bars in Y tion of the grate. An operating rod 36 for l which is closed by-a clinker door pivotally supported by a shaft 35a, and supported against rocking movementin one direction by lugs 34 carried atfone side of the opening bv the relatively fixed or non-rocking porthis `door is connected to anuarmf1 extending downwardly from the'shaft 35 and is eX- tended through an opening `formed in a furnace wall 10`and `operates over a roller 87. The outer endof -this rod, has formed therein 4a series of'notches 38for engagement lby ,a vlever, 39, The lever 39` is'oscillat-able in the general directionfof thehbar and is also oscillatabl al plane transverseto this bar, its movement being controlledbya slot40 in aV control platform 41 through which it extends.

`When disposed inthe slot y4O ,.the leveren- `gages one or theother of the notches 38 and is only shiftable longitudinally` of the bar .36. The slot 40 has, however, a cove 42 into which 4thei'lever may be movedto disengage the same A from the rod.

VWithinV the l d rotating shaft 43 having cranks 44 link-connected, as at `45, withl the l this grate is 'reciprocatedasi theshaft is rotated. It will be obvious that with the lever 39Min the cove 42, the reciprocation of the rod'36` resulting fromfthe reciprocation of the grate,`is` not interferedv with.` The rotation" ofthe shaft `43 may be `discontinued at any de,-v siredl time by manipulation of a clutch 4 6 by an operating rod'46'l therefor.`

and `designated 56; The' numeral 57, generallyddesignat'es ae conduit 'leading `from a blower which,if` desired, maybe the same blower .whichjsupplies ,thee pipe 24'. This lconduit `57 has two outlet branches entering;

the furnace through the walls thereof below the fuel inlets 56.v ,l One only of the outlets is shown Vand designa-ted 59. These outletshave their termina-ls iiattened, asindicated at 60, soV that .they provide a broad .relatively high speed jet across which the fuel from Vthe conduits would fall` T'hese'jets cause thel fuel'to ,be blown out into the furnace and' thoroughly intermi'ngeld with 'the air from the nozzles, so that it may be .readilyignited The burning fuel falling downwardly Y through theY furnace will be consumed or nearly so. Y Unconsumed particles coming in the rangeY of the air blast from the openings 20vof the twyers v13are blown back into the furnace is arranged a yslowly grate 28, so' that the larger particles or clinkers collect, they may be removed at any time bydisengaging theiclutch 46, engaging the'leven) with the rod 36 and'tilting the door or clean-out section 35.

Since theconstruction hereinbefore set forth is capable of a certain range of change andinodiiication without materially departing fromthe spirit ofthe invention, I do not limit myself vto such specific structure except as hereinafter claiilfled..V

Iclaimgl l 5 y Y l. In a furnace, afwall, a baffle inclining inwardly and downwardly from thewall and at itsinner edges defininga central opening, a grate reciprocablymounted beneath, said opening and having acentral cleanout open ing, a door controlling theclean-out opening, means for reciprocating the grate, a` shaftrockably supporting the door on the grate, an arm carried by the shaft, a rod` connected with the `arm and a lever swingable in a plane transversely of the rodto engage or disengage the samefrom the rodl and in a plane .longitudinal to the rod-whenengaged therewith to shift the Vrod to operate the door.

2. In, a1furnace,.a wall,1avloaffleA inclining inwardly and downwardlyfrom the wall and at its inner edges defininga central opening, afgrate beneath said opening, twyers` arranged betweent-he lower edges of the vbaiiie wall and saidgrate, said ,twyers having openings for directing'sa blast of .air upwardly and inwardly therefrom, and means for blow- A ing powdered fuel vinto the furnaceatxtha e Pulverlzed fuel isfed yto 4:the furnace by conduits,` which enter the furnace throught `one wall" thereof A e adjacent Y'opposite sides `thereof.` Only one'ofslaid conduits is shown inwardly and downwardly from thewalland e at itsy inner` edges deiininga centralopening, a grate beneathsald opening, and twyers arranged between the lower edgesofthe baileU wall and said grate, said twyershaving openings forh directinga blast of air `upwardly andinwardly therefrom, and certain of the twyers having other openings directinga blast of air across the grate. v

V4.1 InV a furnace for burning, pulverized.

, fuel, a furnace wallga baffle inclining inward-l ly and downwardly from the wall and at its -inner edges defining a central opening,.

twyers arranged about the edges of the openingbeneath the inner edges of thewall, a grate: reciprocably mounted beneath and inspaced relation 4to the twyers, means for reciprocating said grate, and bars4 pivotally connected jwith" the` twyers at their upper outer ends and resting upon the grate at their inner lower ends land constituting a grate connection therebetween.

5. In a furnace for burning pulverized fuel, a furnace wall, a baliie inclining inwardly and downwardly from the wall and at its inner edges defining a central opening, twyers arranged about the edges of the opening beneath the inner edges of the wall, a grate reciprocably mounted beneath and in spaced relation to the twyers, means for reciprocating said grate, bars pivotally connected with the twyers at their upper outer ends and resting upon the grate at their inner lower ends and constituting a grate connection therebetween, a shaft to which the inner lower ends of the bars at each side of the opening are connected and means holding the ends of the bars in spaced relation to one another.

6. In a furnace, a wall, a baliie inclining inwardly and downwardly from the wall and at its inner edges defining a central opening, a grate mounted beneath said opening and in spaced relation to the baflie, twyers arranged beneath the edges of the opening and having openings for delivering air through the opening at an angle inelining inwardly and upwardly above the center of the opening, dampers within the twyers for controlling the passage of air throughV said openings, said twyers having other openings directing air downwardly in the direction of and longitudinally of the grate and dampers within the twyers for controlling the last named openings.

In testimony whereof I hereunto afix my signature.

WILLIAM G. CROTHERS. 

